555505505551 has 2 divisors, whose sum is σ = 555505505552. Its totient is φ = 555505505550.

The previous prime is 555505505537. The next prime is 555505505557. The reversal of 555505505551 is 155505505555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555505505551 - 2⁹ = 555505505039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555505505557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277752752775 + 277752752776.

It is an arithmetic number, because the mean of its divisors is an integer number (277752752776).

Almost surely, 2^555505505551 is an apocalyptic number.

555505505551 is a deficient number, since it is larger than the sum of its proper divisors (1).

555505505551 is an equidigital number, since it uses as much as digits as its factorization.

555505505551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1953125, while the sum is 46.

The spelling of 555505505551 in words is "five hundred fifty-five billion, five hundred five million, five hundred five thousand, five hundred fifty-one".